API Test Engineer Middleware & Microservices Migration

API Test Engineer – Middleware & Microservices Migration

Location: Remote

Duration: Contract to hire

Job Summary

We are looking for API Test Engineers to validate migrated APIs and microservices during a large-scale IBM Middleware modernization project. The engineer will ensure functional parity, performance, and reliability between legacy and modernized services.

Key Responsibilities

• Develop API test strategies and test plans.
• Validate migrated APIs against existing ACE/IIB implementations.
• Perform functional, integration, regression, and performance testing.
• Create automated API test suites.
• Validate JSON/XML transformations and message mappings.
• Support UAT and production deployment validation.
• Report defects and coordinate with development teams.

Required Skills

• 4+ years of API testing experience.
• Hands-on experience with:
• Postman
• REST Assured
• Swagger/OpenAPI
• JMeter
• API Automation Frameworks
• Strong understanding of REST APIs and Microservices.
• Experience with JSON, XML, and API payload validation.

Preferred Skills

• Experience testing IBM ACE/IIB integrations.
• CI/CD pipeline testing.
• Knowledge of Kubernetes and containerized applications.

Project Details

• Migration of multiple IBM Middleware APIs
• Source Platforms: IBM ACE 12, IIB 8, IIB 9
• Target Platform: Java Spring Boot Microservices
• Duration: Approximately 6 Months
• Immediate Joiners Preferred.